﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace shop.util
{
    public class StringUtil
    {
        public static bool IsBalnk(string str)
        {
            return str == null || str.Trim().Equals("");
        }

        public static bool NotBalnk(string str)
        {
            return !IsBalnk(str);
        }
    }
}